Physics Class 12
Solutions to CBSE Sample Paper - Physics Class 12

(a) Explain the term drift velocity of electrons in a conductor .Hence obtain the expression for the current through a conductor in terms of drift velocity.

(b) Two cells of emfs E 1 and E 2 and internal resistances r 1 and r 2 respectively are connected in parallel as shown in the figure. Deduce the expression for the

(i) equivalent emf of the combination

(ii) equivalent internal resistance of the combination

(iii) potential difference between the points A and B.

Question 32b - Two cells of emfs E1 and E2 - teachoo.jpg



Question 32 - Explain the term drift velocity - teachoo.jpg

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.